Grate-bar



(No Model.)

FpH. LUDINGTON & F. PERoIvA-L'.-

i GRATBVBAR.

No.r 551,353. PatentedDe. 10,1895.-

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m 'wir mi] am IMI [HE HU UNITED STATES PATENT OEEicE.

FRANCIS Il. IiUDING-TON AND FREDERICK PFRCIVAL, OF S". LOUIS, MISSOURI.

eRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 551,353, dated December 10, 1895. Application filed March 30, 1895. Serial No. 543,898. (No model.)

To all wiz/0171, it may concern:

Be it known that We, FRANCIS Il. LUDING- To): and FREDERICK PEEcivAL, of St. Louis, Missouri, have made a new and useful Improvement in Grate-Bars, of which the fol* lowing is a full, clear, and exact description.

Our improvement relates to that class of grate-bars having removable leaves strung upon the bar, and has for its chief objects, first, the protection of the bar proper from the heat of the fire to an extent sufficient to prevent warping; second, to prevent the accumulation of elinkers; third, to improve the shape of the removable leaves, and fourth, to facilitate the introduction of new leaves when the old ones become broken. TWe attain these objects by the mechanism illustrated in the accompanying drawings, in Which- Figure l represents a plan View of a pair of our improved bars arranged with reference to each other as We prefer to arrange them. Fig. 2 represents a view of those ends of the same pair of bars on which are placed What We term the lockingleaves. Fig. 3 represent-s a horizontal cross-section of the saine pair of bars along the line 3 8 of Fig. l. Fig. al. is a similar view, except that the bars are shown in an inclined position. Fig. 5 is in part a side elevation of the body of one of the bars and one of the leaves and in part a vertical longitudinal section of two leaves on the bar along the line 5 5, Fig. 3. Fig. d is in part a top view of the main portion of the bar and in part a horizont-al longitudinal section of two leaves in place along the line G G, Fig. 3; and Fig. 7 is in part a vertical crosssection of the end of the bar at the point where the leaves are inserted and in part an end view of a leaf pushed down and ready to be slid into position.

Similar letters refer to similar parts throughout the several views.

A represents the bar on which the leaves are strung. Its sides preferably slope inward from top to bottom, except at one end section, as shovm; but that shape is not essential. It is provided with two longitudinal grooves or rests d a, one running along each side. XVe prefer not to extend it along that section of the bar A shown in cross-section in Fig. 7,

largest on and which is usually occupied by what We term the look-leaf.

B B, rte., are leaves which are slipped 4on the bar A. B is an upwardly-projecting part upon Which the fuel chiefly rests. It is preferably formed, as shoun in Figs. 2, S, and 4, With the teeth b l) l) Z) b, With vertical sides, and tops at right angles thereto. This form facilitates the crushing of clinlrers when the bar is rocked, and is also efficient in enabling the bar to force clinkers doivn into the ashpit. The special form described is not, however, essential. Other Well known forms may be substituted, as will be obvious.

IVe prefer to so form the fuel-support that its top and side edges slant inward toward the side of the leaf from which the Hange hereinafter described extends, substantially. as shown in Figs. 5 and G. This We prefer to do regardless of Wh ether the fuelsupport is formed in other respects as shown in the drawings or not.

Each leaf B is provided with a lian ge 1)' and tivo legs or supports h2 b2. Those portions of the flange l1 which extend out from these legs are practically parts thereof. rlhe outer sides and top of the flange t' preferably slope inward toward its outer edge. The legs b2 b2 terminate in inwardly-projecting feet or lugs h3 b3. When the leaf is in place on the bar A, these feet rest respectivelyv on the bottoms of the grooves a d, as shown in Figs. 3, Ll, and 5, and prevent or assist in preventing the leaf from being lifted off the bar. The opening b4, Which extends through each leaf B and permits it to be slid into place on the bar A, is preferably flared, and is preferably the flanged side. This opening is made so large at the largest end that a space h* is left between the top and sides of the bar and the leaf B above the latters feet h3. "We prefer to have an open space between the bar and leaf at the smaller end of the opening as Well as its larger end, substantially as shown in Figs. 5 and 6, and the space between the top of the bar A and the leaf is preferably greater than the space between the sides of the bar and the leaf, for the reason that While the leaf, in its best form, does not rest on the top of the bar at any time, it is when in the position shown in Fig. 5, in Contact IOO fi Y 551,353

with the upper side ofl the bar, and is thereby, to a considerable extent, supported. The feet b3 b3 do not iit the grooves a d tightly, f

only tokeep the spaces between the tops of Y the fuehsupports B' of the leavesfrom Vbecoming filled with 'clinkers, but also tends to prevent ashes/from becoming lodged between the leaf and the bar. Y Keeping the air-space between the leaves and the bar openV ten ds to prevent the bai-'from becoming over-heated and warping. Y Y

c In placingthe leaves B on the bar they are arranged as shown in Figs. yl, 5, and 6, with an unflanged side of Vone leaf next the flanged side, of another. The flanges not only sepa-V rate the fuelsupports BV so as to 'leave airspaces between them, but add strength to the Vleaves and assist in protecting the bar A.

C. C are leaves which didier from the leaves B in several respects. They are intended to be `removable by an upward pressure, and toV be placed on that portion of the bar shown in cross-section in Fig. 7. kWe do not lock them in place as vwe do; not consider it necessary.

It, may be done if desired. The opening cV between the legs c c' should preferably be of Y a size to lit the bar tightly, andthe leaf rests directly upon the top Vof the bar, as shown in Fig. 2. The leaves C are not provided with feet. Their preferred form is shown in Fig.

' 2. As will be obvious, the form may be modified in many ways, the essential point with reference to this leaf C being merely that it shall be so formed that it can be taken olf the bar vertically, without any lateral movement. As will be obvious, the bar may, if desired, be made in cross-section, as shown in Fig. 3, from end to end, and the leaf C omitted. When the preferred form of bar is used and one of the leavesB becomes broken, all that is necessary is to knock the broken leaf olf the bar and push the remainingleaves together, leaving a space for a new leaf next The leaf C is then removed, a

the leaf C.

Vleaf B dropped down on the rbar on the end section and pushedinward, so as to Vcause its feet to rest in the grooves d a, and the leaf C replaced.

Our improved'bar is especially useful asa rockingbar, andwhere it is used as such we prefer to so arrange the Lrocking mechanism as to rock all the bars in the same direction, as illustrated in Fig. i. le have designed no new form of rockingmeehanism and have Any well-known rock-y 'I therefore shown none. ing device may be used.

XVe claim-fV f Y l. The combination of a bar having longi# tudinal grooves running along each'side, and

a series of leaves with downwardly extending legs and inwardly'extending feet, said feet entering said grooves Vand resting upon the bottoms thereof, and supporting said leaves and preventing said leaves from being removed by lifting them directly upward when in position, substantially as described.

2. The combination of a bar having a longitudinal groove running along each side,

and a series of'leaves, each having an opeir ing through it permitting it to be slipped into place/on said bar, and each having on each side, a downwardly extending leg, pro-L vided with an inwardly projecting foot, ex-

tending into and resting withinV one of said grooves in said bar, and supporting the leaf when ink a Vvertical position, and keeping it" out of Contact with the top of rthe bar, substantially as described.

Y 3. VThe combination of a bar having a longitudinal groove running along each side, and Va series of leaves each having an opening through permitting kit to be slippedinto place on said bar, and each having on each side, a downwardly extending leg, provided with an inwardly projecting foot, extending into and resting within one of said grooves, and supporting said leaf when in a vertical position and preventing its being lifted directly olf the bar when in position, while allowing longitudinal movement on the bar, and said leaves having lateral play on the bar, and being kept out of contact with its top, substantially as described.

FRANCIS H. LUDINGTCN. FREDERICK PERCIVAL.

lVitnesses HENRY L. CHASE, WM. RANDOLPH.

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